DE2744725C3 - Wear-resistant coating of the work surface of disc-shaped machine parts made of aluminum or aluminum alloys - Google Patents
Wear-resistant coating of the work surface of disc-shaped machine parts made of aluminum or aluminum alloysInfo
- Publication number
- DE2744725C3 DE2744725C3 DE2744725A DE2744725A DE2744725C3 DE 2744725 C3 DE2744725 C3 DE 2744725C3 DE 2744725 A DE2744725 A DE 2744725A DE 2744725 A DE2744725 A DE 2744725A DE 2744725 C3 DE2744725 C3 DE 2744725C3
- Authority
- DE
- Germany
- Prior art keywords
- wear
- resistant coating
- aluminum
- coating according
- disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000576 coating method Methods 0.000 title claims description 21
- 229910052782 aluminium Inorganic materials 0.000 title claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 20
- 239000011248 coating agent Substances 0.000 title claims description 19
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 9
- 239000000919 ceramic Substances 0.000 claims description 11
- 239000011195 cermet Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 230000002411 adverse Effects 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 238000007750 plasma spraying Methods 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 239000007921 spray Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/127—Discs; Drums for disc brakes characterised by properties of the disc surface; Discs lined with friction material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/125—Discs; Drums for disc brakes characterised by the material used for the disc body
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12063—Nonparticulate metal component
- Y10T428/12139—Nonmetal particles in particulate component
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Braking Arrangements (AREA)
- Coating By Spraying Or Casting (AREA)
- Mechanical Operated Clutches (AREA)
Description
Die vorliegende Erfindung bezieht sich auf eine verschleißfeste Beschichtung der Arbeitsoberfläche von scheibenförmigen Maschinenteilen aus Aluminium oder Aluminiumlegierungen, sowie deren Verwendung auf Bremsscheiher,, insbesondere für Motorräder, oder Kupplungsscheiben.The present invention relates to a wear-resistant coating for the work surface of disc-shaped machine parts made of aluminum or aluminum alloys, as well as their use Brake discs, especially for motorcycles, or clutch disks.
Nach dem bisherigen Stand der Technik ist es üblich, Brems- und Kupplungsscheiben aus Stahl, einem für die gestellten Anforderungen genügend verschleiß- und abriebfesten Material, herzustellen. Es hat sich deshalb erübrigt, für diesen Werkstoff spezielle Oberflächenbehandlungen vorzusehen. Im Fahrzeugbau wirken sich die verhältnismäßig schweren Bremsscheiben aus Stahl nachteilig aus, weil die ungefederte Masse groß ist, was sich in einem geringeren Fahrkomfort ausdrückt. Bei Kupplungsscheiben ist eine möglichst niedrige Masse erwünscht, weil damit der Energieaufwand für die Rotationsbewegung gering gehalten werden kann.According to the prior art, it is common to have brake and clutch disks made of steel, one for the Make sufficient wear and abrasion-resistant material to meet the requirements. It has therefore there is no need to provide special surface treatments for this material. In vehicle construction the relatively heavy steel brake discs are disadvantageous because the unsprung mass is large, which is expressed in a lower driving comfort. The lowest possible mass is required for clutch disks desirable because this means that the energy required for the rotational movement can be kept low.
Fahrzeug- bzw. Maschinenbauer sind schon vor einiger Zeit dazu übergegangen, den Wc.kstoff Stahl durch das wesentlich leichtere Aluminium zu ersetzen.Vehicle and machine builders switched to the Wc.kstoff Stahl some time ago to be replaced by the much lighter aluminum.
Aluminium ist jedoch gegen Reib-Verschleißbeanspruchung wenig widerstandsfähig, weshalb die Reibflächen mit einem verschleißfesteren Material beschichtet werden müssen. Die Beschichtung von Aluminium mit Stahl zwecks Erhöhung der Verschleißfestigkeit ist wohl erprobt, aber aus wirtschaftlichen Gründen wieder aufgegeben worden.However, aluminum is against frictional wear and tear not very resistant, which is why the friction surfaces are coated with a more wear-resistant material Need to become. Coating aluminum with steel for the purpose of increasing wear resistance is fine tried and tested, but abandoned for economic reasons.
Die Erfinder haben sich deshalb die Aufgabe gestellt, eine verschleißfeste Beschichtung der Arbeitsoberfläche von scheibenförmigen Maschinenteilen zu schaffen, wobei diese Maschinenteile ein minimales Gewicht, ein optimales Reibverhalten, eine ausreichende Lebensdauer und minimale Herstellungskosten haben. Diese beschichteten Maschinenteile, insbesondere Brems- und Kupplungsscheiben, sollen für eine Fertigung in großtechnischem Stil geeignet sein.The inventors have therefore set themselves the task of creating a wear-resistant coating for the work surface of disc-shaped machine parts, whereby these machine parts have a minimal weight have optimal friction behavior, a sufficient service life and minimal manufacturing costs. These coated machine parts, in particular brake and clutch disks, are to be used for production in industrial style.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Arbeitsoberfläche der Maschinenteile aus thermisch aufgetragenen Cermetbeschichtungen mit aluminiumhaltiger Metallkomponente bestehen.The object is achieved according to the invention by that the working surface of the machine parts made of thermally applied cermet coatings with aluminum-containing metal components exist.
Cermet-Werkstoffe haben zwei Komponenten: Eine keramische und eine metallische. Die erfindungsgemäß eingesetzten keramischen Werkstoffe müssen hart und verschleißfest sein, wozu sich Metalloxide mit entsprechenden Eigenschaften vorteilhaft anbieten. Oxidkeramische Materialien, die aus AI2O3, AI2Oj + TiO2. AI2O) + ZrO2. Cr2Oj oder AI2Oj + Cr2O3 bestehen, haben ausgezeichnete Resultate erbracht. Die metallische Komponente des Cermets kann sowohl aus Reinaluminium als auch aus einer Silizium- bzw. magnesiumhaltigen Aluminiumlegierung bestehen.Cermet materials have two components: one ceramic and one metallic. The ceramic materials used according to the invention must be hard and wear-resistant, for which purpose metal oxides with corresponding properties are advantageous. Oxide ceramic materials consisting of Al 2 O 3 , Al 2 Oj + TiO 2 . AI 2 O) + ZrO 2 . Cr 2 Oj or Al 2 Oj + Cr 2 O 3 have given excellent results. The metallic component of the cermet can consist of both pure aluminum and an aluminum alloy containing silicon or magnesium.
Cermets der beschriebenen Art können unter anderem durch pulvermeiallurgische Verfahren hergestellt werden, tür das Auftragen von CermetSchichien auf Substrate aller Art bieten sich die bekannten thermischen Sprit/verfahren an. wie λ Β. Flamm oder Plasmaspritzen.Cermets of the type described can be produced, inter alia, by powder-mechanical processes for the application of CermetSchichien The well-known thermal fuel processes are suitable for all types of substrates. like λ Β. Flame or Plasma spraying.
Bei der Festlegung des Verhältnisses /wischen keramischem und metallischem Anteil des Cermets muß berücksichtigt werden, daß die keramische Komponen te Härte und Verschleißfestigkeit, die metallische Komponente Duktilitiit und Schlagunempfindlichkeil bewirkt. Bei verschleißfesten Arbeilsöberflächen hat man das Bestreben, den metallischen Anteil derart zu minimalisieren, daß gerade noch die erforderliche Dukilität und Schlägiinempfindlichkeit erreicht wird. Dies ist der Fall, wenn das GewichtS'Verhältnis Keramik zu Metall zwischen 90 :10 und 60 :40 liegt. Für die vorzugsweise verwendete Zusammensetzung derWhen setting the ratio / wipe ceramic and metallic components of the cermet must be taken into account that the ceramic components te hardness and wear resistance, the metallic component ductility and impact resistance wedge causes. In the case of wear-resistant working surfaces, the aim is to increase the metallic portion in this way minimize that the required duckility and impact sensitivity is just achieved. This is the case when the weight / ratio Ceramic to metal is between 90:10 and 60:40. For the preferably used composition of the
Cermets ist ein Gewichts-Verhältnis von Keramik zu Metall, das zwischen 85 :15 und 75 :25 liegt, besonders geeignet. Diese Mischungen zeigen auch eine genügend hohe Wärmeleitfähigkeit, um die beim Bremsen erzeugte Wärme an das Grundmaterial Aluminium weiterleiten zu können.Cermets are a weight ratio of ceramic to metal that is between 85:15 and 75:25, especially suitable. These mixtures also show a sufficiently high thermal conductivity to prevent braking to be able to transfer the generated heat to the base material aluminum.
Vor dem Aufbringen des Cermets kann eine vorzugsweise 10—100 μπι dicke Haftschicht aus Aluminium aufgetragen werden, in welcher der Cermet verankert wird.Before the cermet is applied, a preferably 10-100 μm thick adhesive layer made of aluminum can be used can be applied in which the cermet is anchored.
Eine qualitativ hochwertige verschleißfeste Arbeitsoberfläche kann nur erreicht werden, wenn beide Komponenten des Cermets beim thermischen Spritzprozeß vollständig aufgeschmolzen werden. Die Spritztemperatur ist einerseits dadurch begrenzt, daß die keramische Komponente vollständig aufgeschmolzen werden muß, und andererseits die metallische Komponente nicht verdampfen darf. Das Verdampfen der metallischen Komponente kann verhindert werden, indem eine geeignet große Körnung gewählt wird, beispielsweise von 20 bis 60 μίτι. Die für das Aufschmelzen der keramischen Komponente notwendige Temperatur wird vorteilhaft mit einer Plasmaspritzapparatur erzeugt. Eine wirtschaftliche Herstellung solcher Brems- bzw. Kupplungsscheiben kann nur dann gewährleistet sein, wenn eir. Plasmabrenner mit hoher Spritzleistung zur Verfügung steht. Dazu eignet sich im besonderen Maße ein wasserstabilisierter Plasmabrenner mit 200 kW elektrischer Leistung.A high quality wear-resistant work surface can only be achieved if both Components of the cermet are completely melted in the thermal spray process. The injection temperature is limited on the one hand by the fact that the ceramic component is completely melted must be, and on the other hand, the metallic component must not evaporate. The evaporation of the metallic components can be prevented by choosing a suitably large grain size, for example from 20 to 60 μίτι. The one for melting The temperature required for the ceramic component is advantageously achieved with a plasma spray apparatus generated. Only then can such brake or clutch disks be manufactured economically be guaranteed if eir. Plasma torch with high spray output is available. The special dimensions a water-stabilized plasma torch with 200 kW electrical power.
Wenn bei Bremsscheiben aus Aluminium oder einer Aluminiumlegierung nach bisher üblichen Konstruktionsplänen für öremsscheiben aus Stahl Löcher «ngebracht werden und narh den ben beschriebenen Verfahren eine Beschichtung "Aufgebracht wird, hat sich gezeigt, daß diese Schicht die ai ' sie ausgeübten Scherkräfte nicht aushält. Als Folge davon /eigen sich nach verhältnismäßig kurzer Zeit Risse in der aufgespritzten Schicht, welche von den angebrachten Löchern ausgehen und in radialer Richtung der Scheibe verlaufen.If with brake discs made of aluminum or an aluminum alloy according to the usual design plans Holes can be drilled for front discs made of steel and described in detail Method a coating "is applied" has become shown that this stratum was exercised by the ai 'it Cannot withstand shear forces. As a result, cracks in the sprayed-on layer, which extend from the holes made and in the radial direction of the disc get lost.
linsere Versuche haben gezeigt, daß diese Rißbildung vor allem auftritt, wenn zwei Löcher, die auf einer Radiallinie der Scheibe liegen, einen zu geringen Abstand haben. Überraschend hat sich gezeigt, daß dieses Phänomen der Rißbildung durch eine besondere Anordnung der Löcher vollständig unterdrückt werden kann. Diese Löcher werden s<i angeordnet, daß der Zwischenraum zwischen zwei Löchern mindestens 6 mm beträgt, und daß die Verbindungsgeraden von iwei beliebigen Löchern mit der durch eines der beiden Löchern gehenden Radiallinie einen Winkel von mindestens 30" aufweist.Liner tests have shown that this cracking occurs especially when two holes that lie on a radial line of the disk are too small To have a distance. Surprisingly, it has been shown that this phenomenon of cracking by a special Arrangement of the holes can be completely suppressed. These holes are arranged s <i that the The gap between two holes is at least 6 mm and that the straight line connecting i any two holes with the radial line going through one of the two holes an angle of at least 30 ".
Die Anzahl, die Anordnung und der Durchmesser dieser Löcher dürfen die Festigkeit der Brems- bzw. Kupplungsscheibe nicht nachteilig beeinträchtigen. Im Gegensatz /u der Anordnung liegen die Anzahl und der Durchmesser der angebrachten Löcher im Rahmen der üblichen Bremsscheiben aus Stahl. Aus wirtschaftlichen Gründen durchsetzen diese Löcher vorteilhaft nicht nur die Arbeitsfläche, sondern die ganze Bremsscheibe.The number, arrangement and diameter of these holes must not adversely affect the strength of the brake or clutch disc. In contrast / u of the arrangement, the number and diameter of holes are mounted in the ordinary steel discs. For economic reasons, these holes advantageously not only penetrate the work surface, but also the entire brake disc.
Anstelle der Löcher können auch höchstens 20 Schiit· ze angebracht werden, Wobei die Achsen der Schlitze mit einer sie schneidenden Radiallinie einen Winkel aufweisen, der Vorzugsweise zwischen 30 und 60° liegt. Die Dimensionen (Länge und Breite) der Schlitze Werden dadurch begrenzt, daß die Festigkeit der Bremsscheibe nicht beeifilfächligt werden darf. In der Praxis haben sich Schlitze mit einer Breite von 4—6 mm und einer Länge, die höchstens die Hälfte der Scheibenbreite ausmacht, gut bewährt.Instead of the holes, a maximum of 20 slots can be attached, with the axes of the slots have an angle with a radial line intersecting them which is preferably between 30 and 60 °. The dimensions (length and width) of the slots are limited by the strength of the Brake disc must not be overlaid. In the Practice have slots with a width of 4-6 mm and a length that is at most half the width of the pane, has proven its worth.
Nach einem weiteren Merkmal der Erfindung werden die scheibenförmigen Maschinenteile für Bremsscheiben, insbesondere für Motorräder, oder Kupplungsscheiben, insbesondere in Automobilen, verwendet. Die verschleißfesten Maschinenteile können jedoch auch als Bremsscheihen in Maschinen für die spanabhebende Metallbearbeitung, beispielsweise bei Scheibenbr ?msenAccording to a further feature of the invention, the disc-shaped machine parts for brake disks, used in particular for motorcycles or clutch disks, especially in automobiles. the Wear-resistant machine parts can also be used as brake blades in machines for cutting Metal processing, for example for disc brakes
ίο von Drehbänken, eingesetzt werden.ίο be used by lathes.
In Motorrädern eingesetzte Bremsscheiben werden entgegen den Erwartungen nicht so heiß, daß das Aluminium wegschmelzen oder zumindest alle Festigkeitseigenschaften verlieren würde. Die meisten schwereren Motorräder haben zwei Bremsscheiben am Vorderrad, bei welchen es sich gezeigt hat, daß die Luftkühlung so stark ist, daß Aluminiumbremsscheiben selbst bei einer Vollbremsung nicht wärmer als ca. 300°C werden können. Die eingesetzten Aluminiumlegierungen halten diese Wärmebelastungen ohne unerwünschte Festigkeitsverluste aus.Contrary to expectations, brake discs used in motorcycles do not get so hot that that Would melt away aluminum or at least lose all strength properties. Most of the heavier ones Motorcycles have two brake discs on the front wheel, which have been shown to have the Air cooling is so strong that aluminum brake discs are not warmer than approx. 300 ° C. The aluminum alloys used withstand these heat loads without any undesirable loss of strength.
Die erfindungsgemäße Beschichtung genügt den harten Anforderungen an eine Brems- bzw. Kupplungsscheibe, auch bezüglich Haftung und Schlagunempfindlichkeit. Die Kombination von oxidkeramischer und metallischer Phase bewirkt eine Paarung von hoher Verschleißfestigkeit u>ad hinreichender üuktilität. Sie genügt außerdem den Anforderungen hoher Korrosionsfestigkeit. The coating according to the invention meets the tough requirements for a brake or clutch disc, also with regard to adhesion and impact insensitivity. The combination of oxide ceramic and metallic phase brings about a pairing of high wear resistance and sufficient ductility. she also meets the requirements of high corrosion resistance.
Die Erfindung wird anhand der folgenden Ausführungsbeispiele nähet beschrieben.The invention is based on the following exemplary embodiments sewing described.
Zur Herstellung einer Bremsscheibe wird ein Rohling in Form einer planen Scheibe aus einer warmfesten, korrosionsbeständigen, schmiedbaren Aluminiumlegierung in der erforderlichen Dicke plangedreht. Der Außendurchmesser dieser 4,5 mm dicken Scheibe beträgt 260 mm, der Innendurchmesser 144 mm. In diese Scheibe werden je 20 Löcher in einerr radialen Abstand von 96. 109 und 122 mm vom Zentrum der Scheibe derart gebohrt, daß je drei Löcher auf einer Geraden liegen, welche mit der Radiallinie durch das innere Loch der Dreiergruppe einen Winkel von 40° bildet. Der Durchmesser der angesenkten Löcher beträgt b mm. Anschließend wird die plangedrehte Scheibe mit Korund (Körnung 0,2—1.2 mm) sandgestrahlt, bis eine Oberflächenrauhigke.t von min. Sa 2,5 erreicht ist. Die auf einer Achse rotierende Scheibe wird gleichzeitig hinten und vorne mit je einer Düse sandgestrahlt.To manufacture a brake disc, a blank in the form of a flat disc is made from a heat-resistant, Corrosion-resistant, malleable aluminum alloy faced to the required thickness. Of the The outer diameter of this 4.5 mm thick disk is 260 mm, the inner diameter 144 mm. In these Disc will have 20 holes at a radial distance from each other 96, 109 and 122 mm from the center of the disc so that three holes on a straight line which forms an angle of 40 ° with the radial line through the inner hole of the group of three. Of the The diameter of the countersunk holes is b mm. Then the faced disc is also included Corundum (grain size 0.2-1.2 mm) sandblasted to a Surface roughness of at least Sa 2.5 is reached. the The disc rotating on an axis is sandblasted at the front and rear with one nozzle each.
Anschließend wird die kalte Scheibe mit einer 200 kW wasserstabilisierten Plasmaspritzpistole beschichtet. Das Spritzmateiral besteht aus 80% AI2Oi (Körnung 15 —40 um) und 20% Reinaluminium (Körnung 20-50 um)The cold pane is then coated with a 200 kW water-stabilized plasma spray gun. The spray material consists of 80% Al 2 Oi (grain 15-40 um) and 20% pure aluminum (grain 20-50 um)
Die aufgespritzte Schichtdicke beträgt ca. 500 μπι.
Abschließend wird die Scheibe mit einer keramisch gebundenen Siliziumkarbidscheibe geschliffen.The sprayed-on layer thickness is approximately 500 μm.
Finally, the disc is ground with a ceramic-bonded silicon carbide disc.
Die Reibfläche einer marktüblichen Kupplungsschei-The friction surface of a commercially available clutch disc
be mit den Abmessungen von 23 cm als äußeren und 18 cm als infiörem Durchmesser wird itiil Korund (Körnung 0,2—1,2 mm) sandgestrahlt, bis eine Öberflächenrauhigkeit von min. Sa 2,5 erreicht ist. Anschlie-Be with the dimensions of 23 cm as the outer and 18 cm as the inner diameter, itiil becomes corundum (Grain size 0.2-1.2 mm) sandblasted to a surface roughness of at least Sa 2.5 is reached. Subsequent
ßend wird die Scheibe, wie in Beispiel 1 beschrieben, beschichtet und geschliffen.ßend the disk, as described in Example 1, coated and sanded.
Eine Bremsscheibe mit den Dimensionen und Lochanordnungen gemäß Beispiel 1 wird mit einem
Bunsenbrenner auf eine Temperatur von 180° C
vorgewärmt. Dann wird mit einer Lichtbogenspritzapparatur eine Schicht vor. 50 μπι Aluminium aufgetragen.
Anschließend wird die Scheibe nach dem in Beispiel I beschriebenen Verfahren beschichtet und geschliffen.
Beispiel 4A brake disk with the dimensions and hole arrangements according to Example 1 is preheated to a temperature of 180 ° C. using a Bunsen burner. Then an arc spray apparatus is used to pre-apply a layer. 50 μπι aluminum applied. The disk is then coated and ground using the method described in Example I.
Example 4
Eine Bremsscheibe mit den Dimensionen und Lochanordnungen gemäß Beispiel 1 wird mit einem Bunsenbrenner auf eine Temperatur von 1800C vorgewärmt. Dann wird die Scheibe, wie unter Beispiel 1 beschrieben, beschichtet und geschliffen.A brake disk with the dimensions and arrangements of holes of Example 1 is pre-heated with a Bunsen burner to a temperature of 180 0 C. The disk is then coated and ground as described in Example 1.
Claims (12)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1098777A CH633868A5 (en) | 1977-09-07 | 1977-09-07 | WEAR-RESISTANT COATING OF THE WORK SURFACE OF DISC-SHAPED MACHINE PARTS MADE OF ALUMINUM OR ALUMINUM ALLOYS. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2744725A1 DE2744725A1 (en) | 1979-03-08 |
| DE2744725B2 DE2744725B2 (en) | 1980-08-07 |
| DE2744725C3 true DE2744725C3 (en) | 1981-09-17 |
Family
ID=4368863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2744725A Expired DE2744725C3 (en) | 1977-09-07 | 1977-10-05 | Wear-resistant coating of the work surface of disc-shaped machine parts made of aluminum or aluminum alloys |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4180622A (en) |
| JP (1) | JPS5452632A (en) |
| AT (1) | AT366420B (en) |
| BE (1) | BE870293A (en) |
| CH (1) | CH633868A5 (en) |
| DE (1) | DE2744725C3 (en) |
| FR (1) | FR2402532A1 (en) |
| GB (1) | GB2003935B (en) |
| IT (1) | IT1099482B (en) |
| NL (1) | NL7809112A (en) |
| SE (1) | SE7809374L (en) |
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| IT1129463B (en) * | 1980-12-19 | 1986-06-04 | Cselt Centro Studi Lab Telecom | NOZZLE FOR THE REALIZATION OF THE FIRST OPTICAL FIBER COATING |
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| US8893863B2 (en) | 2007-08-22 | 2014-11-25 | Tech M3, Inc. | Reduction of particulate emissions from vehicle braking systems |
| EP2122004B1 (en) * | 2007-02-20 | 2013-01-30 | Tech M3, Inc. | Wear resistant coating for brake disks with unique surface appearance and methods for coating |
| ATE551548T1 (en) * | 2007-08-22 | 2012-04-15 | Tech M3 Inc | BRAKE DISC AND PRODUCTION PROCESS THEREOF |
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-
1977
- 1977-09-07 CH CH1098777A patent/CH633868A5/en not_active IP Right Cessation
- 1977-10-05 DE DE2744725A patent/DE2744725C3/en not_active Expired
-
1978
- 1978-07-21 US US05/926,810 patent/US4180622A/en not_active Expired - Lifetime
- 1978-09-05 JP JP10905378A patent/JPS5452632A/en active Pending
- 1978-09-06 AT AT0643878A patent/AT366420B/en not_active IP Right Cessation
- 1978-09-06 GB GB7835759A patent/GB2003935B/en not_active Expired
- 1978-09-06 FR FR7825672A patent/FR2402532A1/en active Granted
- 1978-09-06 SE SE7809374A patent/SE7809374L/en unknown
- 1978-09-06 NL NL7809112A patent/NL7809112A/en not_active Application Discontinuation
- 1978-09-07 BE BE190327A patent/BE870293A/en unknown
- 1978-09-07 IT IT27430/78A patent/IT1099482B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| BE870293A (en) | 1979-01-02 |
| ATA643878A (en) | 1981-08-15 |
| IT1099482B (en) | 1985-09-18 |
| US4180622A (en) | 1979-12-25 |
| FR2402532B1 (en) | 1983-12-23 |
| FR2402532A1 (en) | 1979-04-06 |
| NL7809112A (en) | 1979-03-09 |
| GB2003935A (en) | 1979-03-21 |
| GB2003935B (en) | 1982-06-30 |
| JPS5452632A (en) | 1979-04-25 |
| DE2744725B2 (en) | 1980-08-07 |
| AT366420B (en) | 1982-04-13 |
| CH633868A5 (en) | 1982-12-31 |
| SE7809374L (en) | 1979-03-08 |
| IT7827430A0 (en) | 1978-09-07 |
| DE2744725A1 (en) | 1979-03-08 |
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| Date | Code | Title | Description |
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| OAP | Request for examination filed | ||
| OD | Request for examination | ||
| C3 | Grant after two publication steps (3rd publication) | ||
| 8339 | Ceased/non-payment of the annual fee |